#include <iostream>
#include <string>

using namespace std;

int main() {
  string a, b;
  cin >> a >> b;
  a+=b;
  
  int cnt=0, max=0;
  for (auto &c:a) {
    if (c=='o') {
      cnt++;
      if (max<cnt) max=cnt;
    } else {
      cnt=0;
    }
  }

  cout << max << endl;
  return 0;
}